Door lock attachment



F 9 G. NlCOLlN El'AL DOOR LOCK ATTACHMENT Filed Oct. 23, 1946 Patented Feb. 10, 1948 UNITED STATES PATENT OFFICE DOOR LOCK ATTACHIVIENT George Nicolin and Roy A. Hansen, Chicago, Ill. Application October 23, 1946, Serial No. 705,182

This invention relates to a device which is attachable to a conventional door lock for the purpose of preventing, when desired, a normal operation of the deadlock in response to turning of the key therefor. It frequently happens that ahouseholder will desire to lock himself in to the extent of preventing one who has the requisite door key from using it to gain entrance vto the house. By proper manipulation of the present attachment between two predetermined positions, the deadlock may be locked against key operation or be freed for operation in response to rotation of the key, according as the householder may desire. r

A- device of this character may be produced at small expense and be installed with little effort. when made according to our invention. It is at tachable to the escutcheon plate on the inner side of thedoor, and when secured theretowill be substantially concealed, yet conveniently posi tioned for operation.

A suggestive embodiment of our invention is set forth in the accompanying drawing, wherein:

Figure 1 is a fragmentary perspective view 01. a portion of a door adjacent its free edge, showing installed therein a conventional lock which is equipped with the attachment of our invention;

Fig. 2 is a fragmentary view in elevation looking toward the free edge of the door and lock mortised therein; 7

Fig.- 3 is a. detail in section, taken on line 3-3 of Fig. 2, showing one form of connection whereby the deadlock bolt maybe operated by the spindies which are rotated, respectively, from a key on the outside of the door and a knob on the inside thereof;

Fig. 4 is a fragmentary detail, partly in section, of the deadlock spindle and associated parts in accordance with our invention, the spindle being shown in its in position;

Fig. 5 is a similar view in which the spindle is shown in its out position;

Fig. 6 is a view in elevation showing the deadlock operating knob in its locked position; and

Fig. '1, which is -a. similar view, shows the operating knob in'its unlocked position.

We have shown in the drawing a door D which is mortised to receive a conventional lock having a latch bolt A operable by handles H at opposite ends of a spindle (not shown) which projects beyond opposite faces of the door. The look also comprises a, deadlock having a locking bolt B 4 Claims. (01. 70-129) adapted to be projected outwardly from the face plate II that is recessed in the free edge of the door so as to be flush therewith. The latch bolt and locking bolts areadapted to be received within a keeper (not shown) which may be afiixed to the door jamb in the usual way.

In accordance with usual practice, escutcheon plates l5 are affixed to opposite sides of the door at points opposite the mortised recess therein where the lock is accommodated. These escutcheon plates conceal the opening through the door sides which are provided for reception of the spindles one of which carries the handles H, another designated as It being extended from the rotatable barrel of a key operated cylinder lock I1, and a third, l8, mounting at its outer end an operating knob K. The spindles l6 and it,

"which are square in cross section, are adapted to fit within pinions 20 and 2|, respectively, whereby to rotate them, each pinion being in mesh witha rack bar 22 that is extended from the locking bolt B. This bolt is accordingly adapted for operation in response to turning of (1) a key 23 in the lock I! on the outside of the door, or of (2) the knob K on the inside thereof. Since the parts thus far described are all conventional, it is unnecessary to give further de-' tails concerning their operativerelation as this is well understood in the art.

As shown herein, the escutcheon plate 15 on the inner door side is removably secured in place as by screws 24 so that it may be readily taken off to facilitate attachment of the parts now to be described. These include a disk 25 having an element which forms part of a torsion lock, here shown as a hole 26 (or holes) adjacent its pe riphe'ry; extending from the disk a collar 28 which is received through an opening 29 in the escutcheon plate; and "secured upon the projecting end of the collar, which is threaded, a nut 30 adapted to bear against the inner side of the es cutcheon plate. With the nut tightened in place, the disk is also secured immovably to the escuteh-. eon plate upon its outer side.

Surrounding the spindle I8 is a compression sprin'g'35 confined in place between the collarnutrassembly and a washer 36 which abuts a pin Sit-anchored to the spindle, the spring urging the spindle, together with the knob upon the outer end thereof, to an inward position as shown in Fig. 4. The knob comprises a base plate 46, preferably of a size and shape much the same as the disk 25 which it is adapted to abut. Carried by the knob base is an element forming a, complemental-y part of the torsion lock, here shown as a pin (or pins) 4| projecting inwardly at a. radial point which coincides with that of the hole (or holes) 26 so as to enter freely therein when the knob is moved to the correct rotative position for this purpose. Formed in the face of the disk is a shallow arcuate channel 42 having for its center the axis of the spindle 18, the channel being opposite the pin 4| so as to provide a way in which its acting end may track when the knob is turned to rotate its associated spindle. This channel stops short of the hole 26 so as to leave, in effect,',a barrienwalli 43 atthatpoint. The pin 4| when tracking in the channel "42"Will accordingly abut this wall where rotation of the spindle is halted unless the knob be pulled out;

against the tension of the spring a.-@ ufiiicient distance for the pin end to clear the barrierwall whereupon the pin will be free t'oenter'the' hole 26 and lock the spindle against irotationgeitherlbyf the key or the knob. The deadlo'ck'bolt B'is then fully advanced to locking position. Onlyiby-fitst' pulling out the knob again, to free the pin from the hole 26,-m-ay rotation be: imparted tothe spindie a 8'-for the purpose. of; retracting -th e:locking boltB; So long. assthe pin 4| remains-in the hole 26, operation of thevbolt-Bsfrom .theoutsideof thedoor, even by aperson having. the-proper key, is prevented But when the pit-r241 .is :out of the holeandengaged within the channel 42,-. the knob issmaintained in an out-position (see' Fig. ,5) in which the deadlock isrconditioned. for keyioperation so that thebolt- B may thereby beadvanced to itslocking position. Whensuch an operation takes place; the knob .isr:concurrently rotated to nearly the-position-oi'. Fig; 4 where it .p in. 4| is moved to-.the endof the channel-adjacent the barrier wall 43. The-bolt Bduring this operation will be. advanced substantially. to its limit, and so. long .as the pinv 4| remains inv the channel to sustain the spindle outwardly. -the .-dead1ock. will remain conditioned .for .key operation. It .is only when: the knob pin is positioned inthe hole 26 that the key isincapableof operatingtthe dead.- 100k;

The normal action of a deadlock-may be easily and. effectively. modified by applicationof the present attachmen-t thereto.- Operation, of the locking bolt from the door inside-remains the same. But use of theregularauthorizedkey may or may .not continue. possible, dependingupon the knob adjustment .upon. theinner sideof the door. It is this special objective ,which. our invention has eiiectively accomplished Joy; means .which is inexpensive, facile of application, and simple,in.operation.

We claim:

1. A deadlock in which is-compriseda. rotatable operating spindle, an escutcheonplate having-a hole through which the spindle is extended-,.a disk upon .the outer. face of. the platehaving a .collar extended therethrough .in surrounding relation to the spindle, a, nutv .securedto theycollar. men, gagement with .theui'nner face .of the plate and adapted to bear thereagalnstwith pressuretosfl: cure the disk.immovably,uponthenoutenii'ace.of the plate, a vcompressionspring .coiledlaround vthe spindle having. one. end .engaging the'rewith and the other. engaging the collars-nut -.assembly for exerting thereon a thrust force tending reactive? operating spindle, an escutcheon plate through which the spindle is extended, a disk surrounding thespind-le-and aflixed immovably to the outer face of the plate, a knob carried non-rotatably at the outer'end otthe spindle and provided with a basepwhich; is disposed opposite the disk, means urging the spindle endwise in an inward direction wherebysto advance the knob base toward the disk, and coasting means on the base and disk adapted =to.- -interengage .-whenthe base ahas1'ad vancedtowardthedisk -wherebyyto lock the-spin d-leragainst ;key .-operation.

3. A-deadlock in whichis-comprised ayrotatable operatin =spindle, an escutcheon plate-:having a hole through which the-spindle is extendedt'adisk upon .the outer face of the plate having; -,a=collar extended .therethrough in--surrounding;relation-. to thezspindle; means intereonnecting thecollar and plate ,upon -its.- inner sideto secure theadisk' D.- rotatably uponits outerface. .sp i xm' s erting an inward- .thrust upon the spindle tending tor-maintain the same: in i a predetermined .endwise position, a knob aflixed immovablyytoothe outerend of the-.spindle and. provided, with a. base which lies 'opposite-the-disk, and coacting-means on the-baseand disk adaptedtointerengage when thezspindle-is advanced end-Wise inwardly where+ by, to locksthe-spindleagainst key-operation 4.-- A-dead-lock in which iscomprised a rotatable operating spindle, an escutcheon-platehaving a hole-through Whichthe'spindle-is extended, a, disk upon. ,the outer faceroi vthe plate having} a collar extended, therefrom through the hole thereof in surrounding relation toithe-spindle, .means ZfOI'uSe? curing the; disk-against. rotation :relativefto the plate, an operating knobafiixed immovablyf to the outer end of the spindle and provided Withvfl baseopposite 1 thedisk, coactinglocking meanson thesbase and: .disk adapted fQrdnterengagement when the base is disposed proximate. to thedisk. and: springflmeans in.operative-connection with the spindle: exerting. thereon an endwise thrust force tending to advance. the -spindle inwardly whereby tolockthe knob base-with the disk and prevent key-operation of the. spindle.

GEORGE NICOLIN...

ROY A. HANSEN.-

REFERENCES"CITED1.

The following references;areaofz'record 1mm filie-otzthis' patent: I l V UNITED sTATEsPATnnTs.

Number-.7 Date;

Rancour Dec: 23;1924 

